With Kraven as the last confirmed Sony movie, and a new Spider-Man movie and Avengers: Secret Wars on the horizon, Sony could bring its villains over to the Marvel Cinematic Universe. Their history however, meaning the events from the movies and who they interacted with, wouldn't be brought over. This opens the door for them to appear either in brief cameos or as central antagonists. Either way, this is just one outline (inspired by the Spider-Man games) for how Kraven, Venom, Morbius, and others can be used in a Spider-Man movie.
To make this work, a few assumptions are made. As a result of Secret Wars, the villains from the Sony movie have now made the jump to the MCU. Meanwhile, Knull has found a key to his prison after he acquired and deciphered a partial Codex when Venom merged with the Xenophages in Venom: The Last Dance. Moreover, during the events of Secret Wars , Spider-Man acquired the piece of the Symbiote that arrived on his Earth at the end of No Way Home. Since then, a new crime boss -Mr. Negative- and his Inner Demons have taken over the streets, whom Spider-Man has had run-ins with.
Act 1: Kraven's Last Hunt
Spider-Man responds to an Inner Demons attack, which leaves many casualties. Spider-Man manages to fend of their leader Mr. Negative and helps the casualties, including Flash Thomspon, to FEAST, despite the Symbiote telling him to go after Mr. Negative. At FEAST, Spider-Man meets Nurse Rio Morales, who tends to the injured. When Spider-Man retakes to the streets to go after Mr. Negative, he is ambushed by Kraven. Kraven reveals the Venomized Spider-Man is his final prize. After an exhausting battle, Kraven manages to shoot and seemingly kill Spider-Man, and buries him.
Whilst being buried, Spider-Man receives a vision from Madame Web. She shows Spider-Man that an impending doom is coming for the Symbiote he wears. Spider-Man then reawakens at night, digs his way out and makes his way to FEAST. There he is helped by Nurse Morales' son Miles and the Night Doctor, who turns out to be Dr. Michael Morbius. He uses electric shocks and his sonar abilities to sever the Symbiote’s bond with Spider-Man, allowing Spider-Man to heal. The Symbiote is untethered from Spider-Man, but scurries off to the next room and bonds with the wounded Flash Thompson.
Act 2: Agent Venom
Having recovered days later, Peter creates a new suit after his previous suit was too heavily damaged by Kraven. During Spider-Man's abscence however, a new vigilante named Agent Venom has started taking on the Inner Demons. Spider-Man is approached by journalist Eddie Brock, and together they find Agent Venom interrogating Kraven on how to track Mr. Negative. Spider-Man's arrival results in three-way fight, with Agent Venom ultimately defeating Kraven. While Agent Venom escapes, Kraven allows himself to be arrested, having already proven before he can beat Spider-Man.
Spider-Man contacts Eddie Brock again, who reveals he is looking into the Symbiote himself. Arriving at Mister Negative's last whereabouts, Spider-Man finds Agent Venom having beat him to the punch. It's revealed Venom bonded with Flash as they shared a hatred towards Mr. Negative. Another three-way fight erupts, in which Mr. Negative is beaten and returned to his human form: FEAST's founder Martin Li. Having beat Mr. Negative, Spider-Man convinces Flash to let go of his hatred. Li, guilt-ridden, then transfers his powers to Venom to purify it into Anti-Venom.
Act 3: King in Black
Li reveals once Knull gave him access to Darkforce energy and corrupted him into becoming Mr. Negative, he developed an innate hatred towards symbiotes and it's wielders. Due to some unforeseen circumstance, Li also gained acces to Lightforce energy. Transformed, he used these powers to establish the Inner Demons to draw out the Symbiote-wielding Spider-Man. At this point, Eddie Brock arrives and Anti-Venom bonds with him, resulting in Anti-Venom regaining his memories from Venom with Eddie Brock. However, Knull locates them due to this bond.
Knull's arrival is met by Spider-Man and Anti-Venom's opposition. Suddenly, Anti-Venom is possessed by the Enigma Force and becomes Knull's antithesis. Like matter and anti-matter, the Lightforce and Darkforce champions annihilate each other, ending the fight. Later, it's revealed that Miles and Dr. Michaels were infected with Spider-Man's blood. As result of the electric shocks, it triggered powers in Miles and cured Michaels' disease. After, Kingpin returns and has Phineas Mason equip Vulture, Mysterio, Shocker, Scorpion, and Hobgoblin (a corrupted Ned Leeds) to fight Spider-Man.